A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

Stroll through a wonderland of stupendous moss-covered trees.

Scattered around Atlanta are little doors with big charm.

Tour the sci-fi-esque reality of governmental disease management.

2,000 barrels of aging beer hidden in a warehouse at the Brooklyn Navy Yard.

A modern addition to the Greenpoint skyline.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

Beautiful mosaics cover the first stations opened on New York City's newest subway line.

A hands-on traveling collection of the innovative devices of yesteryear.

Monument to a forgotten NYC disaster that claimed the lives of 1,000.

Manhattan's deadly West Side railroad, which killed hundreds of New Yorkers, is remembered by this simple plaque.

The former home of the reclusive "Weird Wendels" who dominated New York real estate a century before Donald Trump.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

A DIY art gallery/music venue/lecture hall dedicated to video game culture.

During the holidays, a vintage subway train whisks New Yorkers back in time.

Check your calendars; you might be attending a drive-in movie or sitting next to a fashion runway.

A Manhattan Episcopal church with an eerie underground crypt.

The oldest living tree in Manhattan comes shrouded in sinister legend.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

A posh members-only club with a literally dramatic history.